The ESS retains the proven V-block bedding system to form a solid and reliable base for the rifle action. The magazine well has been refined for easy insertion of the magazine, while reducing rattle and movement. The tab style magazine release has been replaced with a semi-flush ambidextrous paddle that can easily be activated by a weak or strong hand. The recoil lug mortise has been designed to accommodate most aftermarket recoil lugs and the trigger area will accommodate most aftermarket triggers. A serrated barricade stop has been added to the front of the magazine well and a polymer forend grip at the balance point adds comfort. The wide foregrip area combined with the octagonal profiled forend tube (sold separately) offers flexible options when shooting over bags or improvised rests. Thumb shelves have been added to both sides of the chassis for shooters who prefer an open grip. The most significant change is the incorporation of the ESS specific buttstock interface, rather than the traditional AR pattern interface. This allows us to place the pistol grip in optimum relation to the trigger, while still allowing the shooter to choose from the wide variety of AR pattern pistol grips which suit their preference.